Transposon Tagging of the Sulfur Gene of Tobacco Using Engineered Maize Ac/Ds Elements

Overview

Journal Genetics

Publisher Oxford University Press

Specialty Genetics

Date 1999 Dec 3

PMID 10581296

Citations 11

Authors

W P Fitzmaurice

L V Nguyen

E A Wernsman

W F Thompson

M A Conkling

Affiliations

Soon will be listed here.

Abstract

The Sulfur gene of tobacco is nuclearly encoded. A Su allele at this locus acts as a dominant semilethal mutation and causes reduced accumulation of chlorophyll, resulting in a yellow color in the plant. An engineered transposon tagging system, based upon the maize element Ac/Ds, was used to mutate the gene. High frequency of transposon excision from the Su locus produced variegated sectors. Plants regenerated from the variegated sector exhibited a similar variegated phenotype. Genetic analyses showed that the variegation was always associated with the transposase construct and the transposon was linked to the Su locus. Sequences surrounding the transposon were isolated, and five revertant sectors possessed typical direct repeats following Ds excisions. These genetic and molecular data are consistent with the tagging of the Su allele by the transposon.

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